2. 外语
  3. He______ have been waiting for us for an hour, for he seems a little anxious.

He______ have been waiting for us for an hour, for he seems a little anxious.

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问题 He______ have been waiting for us for an hour, for he seems a little anxious.
选项 A、need
B、can
C、could
D、may
答案D
解析 译文：他也许等了我们一个小时了，因为他看起来有点儿着急。情态动词题。情态动词need表示“需要”；can意为“能够”；could与can是同义浏，但表达的语气比can弱；may意为“或许，也许”，表示一种猜测，可用于完成时或完成进行时指持续的动作。题干表达对过去事实的一种猜测，因此[D]正确。
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